Sock Programming help

Dear All,

Now I'm coding a socks Programming in AS400 using C.

I had a problem to detect Socket Error when the remote host had already closed 
the socket.
Acttually I already put 'Select' Statement for read the socket, but it didn't  
return any error value.

Another thing, I want to make an single connection, So i put : 

      Listen(sock,0) but the server still can receive an 2 connection for the 
same socket, What should i do if i just want to make 1 connection, and the rest 
connection will automaticly rejected.

Thank You 


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